Turnover in case of Nifty option trading

Sir
I got notice from I. T department stating that my
turnover is very high and according to them they have calculated like this... Suppose nifty is 8600 and call of this 8600 is Rs 50 and my bought qty is 1000..now they he are calculating 8600*1000 (qty) = 8600000 instead of multiply this 1000*50=50000. Please help me.. Thanks